Internal-combustion engine



H. E. FENCHELLE.

INTERNAL COMBUSTION ENGINE.

APPLICATION man JUNE 18. 191s.

1,366,315. Patented Jan. 18,1921.

kw w INVENTOR HUGE". E. FENCI-IELLE, 0F GENOA, ITALY, ASSIGNOR TOWILLIAM L. KANN FFME.

TRUSTEE, OF PITTSBURGH, PENNSYLVANIA.

INTERNAL-COMBUSTIQN ENGINE.

escasas.

Speciication of Letters Patent.

atented Jan. 1S, 1921..

To all w hom it may concern.:

Be it known that I, HUGH E. FENUHELLE, a resident of Genoa, Italy, haveinvented a new and useful Improvement in Internal- Combustion Engines,of which the following is a full, clear, and exact description,reference being had to the accompanying drawing, forming part of thisspeciication, in which: l

Figure l is a sectional view largely diagrammatic of an engine embodyingmy invention;

Fig. 2 is a similar view of a portion of the engine with the movingparts in different positions. I

My invention has relation to improvements in internal combustionengines, and more particularly to engines of the two-cycle type in whichthe power is derived from the combustion of the fuel mixture within theen ine cylinder. K

eretofore, numerous attempts have been made to increase the power ofengines of this type by increasing the volume of air introduced into themotor cylinder during the compression stroke. In so far as I am aware,such attempts have not been successful to any great degree, because thesupplemental air employed has been derived from the same source ofsupply as that employed for scavenging at the beginning of thecompression stroke. crease the pressure of this air, the results aredisadvantageous for two reasons: First, the scavenging is then producedby means of air under high pressure and high velocity and imperfectscavenging results; and sec- 0nd, the force absorbed, by the pump whichsupplies the scavenging air, largelyv if not altogether offsets theincreased power due to the use of such air in the charge.

My invention is designed to increase the power of engines of thischaracter by the introduction -of high pressure air into the motorcylinder during the combustion stroke and after combustion has beeninitiated. In accordance with my invention, this supplemental air supplyis derived from any suitable source, and itsintroduction into thecylinder is controlled by means of an ordinary valve actuated bysuitable connections With the movable part or parts of the engine.

In the accompanying drawing, I have illustrated more or lessconventionally a form of engine embodying my invention.

If it is attempted to in-v from a source of air under relatively lowpressure, such as the pump 7 havingr the piston 8. The numeral 9designates an auxlliary air supply port which leads through a valve seat10 into a chamber 11, connected by a passage 12 with a source of airunder relatively high pressure, such as the pump 13. The port 9 iscontrolled by a slide valve 14, mounted in the seat 10 and having aperipheral port l5, adapted, when the valve is in the right position, toform a means of communication between the air chamber 11 and said port9. This valve is shown as actuated by a pitmanrod 16, connected to acrank 17 on a shaft 18, which may be geared to the main crank shaft 19in any known manner, so as to rotate at the same speed as said mainshaft.

In Fig. 1, the parts are represented as in the positions which theyoccupy at the time the piston is at the end of the combustion stroke,the exhaust port 4 having opened as has also the scavenging port 5. Asthe piston commences its compression stroke, air

under relatively low pressure continues to enter the cylinder throughthe port 5 to continue the scavenging until such time as the pistoncloses the exhaust ports 4. At this time, the valve'14 has opened theport 6 and charge-forming air from the same source of supply Hows intothe cylinder and is compressed in the usual manner.

At the desired point in the compression stroke, the port 9 is uncoveredand the valve 14 is then inthe position shown in Fig. 2, therebyadmitting air under high pressure into the engine cylinder for thepurpose of eecting and supporting combustion therein. As the piston 3passesv the port 9, the valve 14 will be closed before the exhaust port4 is again opened.

While-I have shown the valve' 15 as arranged when in the position shownin Fig. 1. to close the port 6, this is immaterial, as ports 5 and 6 mayboth be controlled solely by the piston 8. It will also be understoodthat any suitable form of valve may be employed to control the port 9,that the valve may be actuated by any suitable connection with a movingpart or parts of the engine, and that the source of air supply and theconnections leading therefrom to the engine may be Widely changed,without departing from the spirit and scope of my invention, as setforth in the appended claims.

AThe advantages of my invention result from the provision of meanswhereby air under relatively high pressure may be forcedinto the enginecylinder .during the explosion stroke, after combustion has beeninitiated, thereby greatly increasing the power delivered by the engine.

I claim:

l. An internal combustion engine having port means for introducing airduring the compression stroke, means connecting said portto a source ofair supply under` rela-l tively low pressure, the engine having anotherair-admission port connected with a source of air supply under higherpressure, and a single valve controlling both said ports and operatingtoadmit an' to the' engine cylinder through the main port on thecompression stroke of the engine and to admit air at higher pressurethrough the second named port during a portion of the combustion stroke;substantially as described.

2. An internal combustion engine having port means for introducing airduring the compression stroke, means connecting said port to a source ofair supply under relatively low pressure, the engine having anotherair-admission port connected with a source of air supply under higherpressure, and a single valve controlling both said ports and operatingto admit air to the engine cylinder through the main port on thecompression stroke of the engine and to admit air at higher pressurethrough the second named port during a portion of the combustion stroke,the cylinder also having a scavenging port connected with the source ofair which is under lower pressure; substantially as described.

3. An internal combustion engine having port means for introducing airduring the compression stroke, means connecting said port to a source ofair supply under relatively low pressure, the engine having anotherair-admission port connected with a source of air supply under-higherpressure, and a single valve controlling both said ports and operatingto admit air to the engine cylinder through the main port on thecompression stroke of the engine and to admit air at higher pressurethrough the second named port during a portion of the combustion stroke,the cylinder also having a scavenging port' connected with the source ofair which is under lower pressure, said port also being controlled bythe aforesaid y valve; substantially as described.

ln testimony whereof, I have hereunto set my hand.

' HUGH E. FENCHELLE.

